<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Promise异步加载图片</title>
</head>
<body>
    <script>
        function loadImage(src){
            return new Promise((resolve,reject) => {
                const image = new Image();
                image.src = src;
                image.onload = () => {
                    resolve(image);
                };
                image.onerror = reject;
                document.body.appendChild(image);
            })
        }

        loadImage("https://img1.iccidchaxun.com/res/logonew.png")
        .then(image => image.style.border = "6px solid red");
    </script>
</body>
</html>